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Financing Agreements - Schedule of borrowings (Details)	Dec. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)	Jul. 09, 2025 EUR (€)	Feb. 14, 2024 USD ($)	Jun. 08, 2022 USD ($)
Debt Instrument [Line Items]
Current portion of long-term debt	$ 22,900,000	$ 22,800,000
Long-term debt	1,556,100,000	1,502,000,000
Former Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 1,000,000,000
Twenty Twenty Four Senior Unsecured Notes Due February Twenty Twenty Nine
Debt Instrument [Line Items]
Debt instrument, face amount				$ 500,000,000
$1,000 revolving credit facility (excluding outstanding letters of credit)
Debt Instrument [Line Items]
Total debt	283,500,000	225,000,000.0
$1,000 revolving credit facility (excluding outstanding letters of credit) | $175 term loan | $175 term loan
Debt Instrument [Line Items]
Debt Instrument, Delayed Draw, Amount					$ 175,000,000
$1,000 revolving credit facility (excluding outstanding letters of credit) | 240 Euro Term Loan
Debt Instrument [Line Items]
Long-Term Line of Credit | €			€ 240,000,000
$175 term loan
Debt Instrument [Line Items]
Total debt	172,800,000	175,000,000.0
$500 senior unsecured notes (1)
Debt Instrument [Line Items]
Total debt	496,200,000	495,800,000
Debt Issuance Costs, Line of Credit Arrangements, Gross	3,800,000	4,200,000
$350 senior unsecured notes (2)
Debt Instrument [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Gross	2,200,000	2,300,000
$200 Term Loan And 185 Term Loan
Debt Instrument [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Gross	5,500,000
Senior Unsecured Debt, 2021 Notes, Three Hundred Fifty Million
Debt Instrument [Line Items]
Total debt	347,800,000	347,700,000
240 Euro Term Loan | Euro Term Loans
Debt Instrument [Line Items]
Total debt	$ 278,700,000	$ 281,300,000

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Data Type:	na
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Period Type: